Hey everyone, my car is actually at the dealer right now getting many things done (you wouldn't believe the dealer sold me a car that needed the front end completely redone -- inner/outer tirerods, ball joints, control arms, struts, bushings ... way to go BMW dealers of NY

), anyways I was looking to get a pair of winter tires and came across these ones on eBay:
eBay Motors: 225/45/17 DUNLOP WINTER SPORT M2 (QTY 4), GREAT SET !! (item 180049546346 end time Nov-17-06 07:01:17 PST)
I read some great reviews at tirerack.com from other BMW owners, the most common experience being a night and day difference from the OEM all-season tires in the snow. I'm used to driving a Mustang so the actual snow driving is not the hassle, but I figured since I switched over to luxury that I might as well couple it with less-fear in the snow, too.
My question regarding the use of these tires: is it OK to use them now in Fall into Winter (where I live its about 35-55 degrees on average, last couple of days have been high of 60), I've just heard some nasty rumors about snow tires doing not to well in higher temperatures. Also, if I am going towards snow tires is Dunlop a good way to go? I've seen Pirelli winter tires but I'm not trying to spend a fortune .. thanks in advance!!